Causes of excessive stomach gas and bloating include constipation, swallowed air, food and beverages, and certain medicines or nutritional supplements, according to WebMD. People may also experience excessive gas when the hormone levels in the body change or they cannot digest lactose.
Foods that increase the amount of gas expelled include dairy products that include lactose, sorbitol or fructose found in sweeteners and fruits, and beans and lentils, notes Mayo Clinic. Foods that cause gas are unable to digest completely.
Medical conditions that can cause excessive gas include gastrointestinal diseases, such as Crohn's disease or a bowel obstruction, explains WebMD. Digestive disorders, such as irritable bowel syndrome, a peptic ulcer, dumping syndrome or Celiac disease, can cause excessive gas, according to Mayo Clinic. People with gastroesophageal reflux disease, gastroparesis and a food allergy or intolerance may also experience excessive gas.
Most people pass gas approximately six to 20 times each day, explains WebMD. Excessive intestinal gas is commonly associated with the need to release gas more than 20 times each day, according to Mayo Clinic. Individuals who have severe or persistent gas should consult with a physician. Medical attention may also be necessary if diarrhea or constipation, vomiting, unintentional weight loss, heartburn or bloody stools accompany excessive gas.